Aneurysmal bone cyst

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Aneurysmal bone cyst

ORPHA:480553Disease

What it is

A rare bone tumor characterized by a benign, cystic lesion consisting of blood-filled cavities divided by fibrous septa containing fibroblasts, multinucleated osteoclast-type giant cells, and reactive woven bone. The tumor may arise de novo or secondarily, complicating other benign or malignant bone tumors. It most commonly arises during the first two decades of life and often affects the epiphyses of long bones and posterior elements of vertebral bodies. Patients typically present with pain and swelling, or neurological symptoms due to compression of nerve roots or the spinal cord by vertebral tumors.

Key facts

Inheritance
Not applicable
Classified as
Disease

ICD-10 codes

M85.5ICD-10 names this disease exactly

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

MEDDRA 10002362MESH D017824MONDO 0018815UMLS C0152244

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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